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<?php |
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namespace Wandu\Event; |
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use Psr\Container\ContainerInterface; |
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use Wandu\Event\Contracts\EventEmitter as EventEmitterContract; |
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use Wandu\Event\Contracts\Listener; |
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use Wandu\Event\Contracts\ViaQueue; |
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use Wandu\Event\Listener\CallableListener; |
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use Wandu\Event\Listener\WorkerListener; |
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use Wandu\Q\Worker; |
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class EventEmitter implements EventEmitterContract |
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{ |
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/** @var array */ |
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protected $listeners = []; |
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/** @var \Psr\Container\ContainerInterface */ |
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protected $container; |
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/** @var \Wandu\Q\Worker */ |
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protected $worker; |
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public function __construct(array $listeners = []) |
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{ |
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$this->listeners = $listeners; |
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} |
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/** |
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* @param \Psr\Container\ContainerInterface $container |
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*/ |
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public function setContainer(ContainerInterface $container) |
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{ |
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$this->container = $container; |
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} |
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/** |
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* @param \Wandu\Q\Worker $worker |
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*/ |
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public function setWorker(Worker $worker) |
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{ |
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$this->worker = $worker; |
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} |
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/** |
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* @param string $event |
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* @param string|\Closure $listener |
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* @return void |
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*/ |
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public function on(string $event, $listener) |
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{ |
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if (!array_key_exists($event, $this->listeners)) { |
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$this->listeners[$event] = []; |
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} |
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if (!in_array($listener, $this->listeners[$event])) { |
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$this->listeners[$event][] = $listener; |
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} |
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} |
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/** |
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* @param string $event |
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* @param string|\Closure|\Wandu\Event\Contracts\Listener $listener |
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* @return void |
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*/ |
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public function off(string $event, $listener = null) |
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{ |
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if (!array_key_exists($event, $this->listeners)) return; |
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if ($listener) { |
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$key = array_search($listener, $this->listeners[$event]); |
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if ($key !== false) { |
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array_splice($this->listeners[$event], $key, 1); |
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} |
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if (count($this->listeners[$event]) === 0) unset($this->listeners[$event]); |
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} else { |
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unset($this->listeners[$event]); |
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} |
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} |
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/** |
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* @param string|object $event |
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* @param array ...$arguments |
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* @return void |
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*/ |
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public function trigger($event, ...$arguments) |
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{ |
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$eventViaQueue = false; |
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if (is_object($event)) { |
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if ($event instanceof ViaQueue) { |
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$eventViaQueue = true; |
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} |
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$eventName = get_class($event); |
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$arguments = [$event]; |
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} else { |
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$eventName = $event; |
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} |
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/** @var \Wandu\Event\Contracts\Listener $listener */ |
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foreach ($this->getListeners($eventName) as $listener) { |
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if ($eventViaQueue && !$listener instanceof WorkerListener) { |
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$listener = new WorkerListener($this->worker, get_class($listener)); |
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} |
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$listener->call($arguments); |
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} |
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} |
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/** |
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* @param $event |
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* @return \Generator|void |
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*/ |
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protected function getListeners($event) |
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{ |
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if (!isset($this->listeners[$event])) return; |
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foreach ($this->listeners[$event] as $listener) { |
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if ($listener instanceof Listener) { |
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yield $listener; |
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} elseif (is_callable($listener)) { |
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yield new CallableListener($listener); |
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} elseif ($this->container && $this->container->has($listener)) { |
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$listenerInstance = $this->container->get($listener); |
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if ($listenerInstance instanceof Listener) { |
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if ($listenerInstance instanceof ViaQueue) { |
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yield new WorkerListener($this->worker, $listener); |
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} else { |
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yield $listenerInstance; |
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} |
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} |
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} |
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} |
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} |
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} |
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Wandu /
Framework
